Renesas R2A30428BM#W0

Overview

R2A30428BM#W0 from Renesas Electronics is a 6-channel motor driver IC designed for precision actuator control in digital still cameras (DSC), digital video cameras (DVC), and surveillance camera autofocus/zoom modules. It integrates six H-bridge outputs, supports 128–512 microstep resolution on channels 1–4, constant-current drive on channels 5–6, and features built-in PI drivers and Schmitt buffers. Its WLP-36 package enables ultra-compact optical module integration.

For engineers reviewing the R2A30428BM#W0 datasheet, R2A30428BM#W0 pinout, R2A30428BM#W0 application, or R2A30428BM#W0 equivalent, key selection criteria include channel-specific drive modes (CV/CC/FS), thermal derating behavior at >25°C ambient, serial 3-wire interface timing, VM/VCC supply isolation, and exclusive-control mode enabling 7-channel-like operation without hardware modification.

Technical Context

The R2A30428BM#W0 implements per-channel configurable drive architecture: channels 1–4 support 2-phase stepper and microstepping (128/256/512) with full-swing constant-voltage output; channels 5–6 operate in constant-current mode with external RNF feedback resistors and dedicated FS/CC control logic. An exclusive-control mode allows time-multiplexed activation of channels 5–6 to emulate a 7th channel.

It integrates three independent PI driver channels (PI1–PI3), three Schmitt buffer inputs (B1IN–B3IN) with buffered outputs (B1OUT–B3OUT), low-voltage detection, thermal shutdown, and internal isolation between VCC (2.7–3.6 V) and VM (2.7–5.5 V) supplies to prevent reverse current flow.

Key Specifications

Pinout & Package

Package: Wafer-Level Package (WLP-36), 36-ball array, 0.4 mm pitch, body size 2.62 mm × 2.92 mm, thickness 0.60 mm. All VM pins (VM12, VM34, VM56) are electrically isolated internally and must be connected externally per channel group.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 6-channel motor driver applications.

Compared with TB6612FNG and DRV8837, the R2A30428BM#W0 delivers 6-channel coordinated control, embedded microstepping, and system-level integration (PI drivers, Schmitt buffers, supply isolation) in a 2.62 mm × 2.92 mm footprint-reducing total solution size by >65% and eliminating ≥12 external passive and active components.

Availability

R2A30428BM#W0 is available at Aetrix Electronics and suitable for digital camera autofocus modules, surveillance PTZ mechanisms, and optical image stabilization subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant wafer-level packaging.

Supply support for R2A30428BM#W0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader headquartered in Japan, specializing in microcontrollers, analog & power devices, and system-on-chip solutions for automotive, industrial, and consumer markets.

The R2A30428BM#W0 belongs to Renesas' camera-optimized motor driver product line, engineered specifically for miniaturized optical actuation in DSC, DVC, and surveillance imaging systems where board space, thermal density, and precise motion control are critical.

FAQ

What drive modes does the R2A30428BM#W0 support on each channel group?

The R2A30428BM#W0 supports constant-voltage (CV) and full-swing (FS) drive on channels 1–4 for stepper motor control with 128/256/512 microstep resolution. Channels 5–6 support constant-current (CC) and FS modes, using external RNF5/RNF6 resistors to set current limits. The R2A30428BM#W0 also enables exclusive-control mode to time-multiplex ch5/ch6 for 7-channel-like operation.

How is power supply isolation implemented in the R2A30428BM#W0?

The R2A30428BM#W0 features internal isolation between VCC (2.7–3.6 V, logic/analog supply) and VM (2.7–5.5 V, motor supply) domains. This prevents reverse current flow between supplies, eliminating the need for external blocking diodes. Each VM group (VM12, VM34, VM56) is electrically isolated and must be connected externally with appropriate decoupling.

What thermal management provisions does the R2A30428BM#W0 include?

The R2A30428BM#W0 incorporates a thermal shutdown circuit that disables all outputs when junction temperature exceeds 150°C. Its allowable power dissipation decreases linearly at −12.96 mW/°C above 25°C ambient. The WLP-36 package's low thermal resistance and exposed die pad design facilitate efficient heat transfer to the PCB, supporting sustained operation in compact camera modules up to 85°C ambient.

Can the R2A30428BM#W0 drive both stepper and DC motors simultaneously?

Yes-the R2A30428BM#W0 can concurrently drive stepper motors on channels 1–4 (using 2-phase or microstep modes) and DC motors or solenoids on channels 5–6 (using constant-current mode). Channel groups operate independently; however, exclusive-control mode restricts simultaneous activation of ch5 and ch6 to prevent thermal overload, ensuring safe multi-actuator coordination.

What interface options does the R2A30428BM#W0 provide for configuration and control?

The R2A30428BM#W0 supports both parallel and serial control. Parallel mode uses dedicated input pins (INA, INB, INC, IN12) for basic step/direction commands. Serial mode employs a 3-wire interface (SCLK, SDAT, CS) to configure microstep resolution, current limits, u-STEP registers, and drive mode selection-reducing required MCU GPIOs and enabling dynamic reconfiguration during operation.